Type-writing machine



TYPE WRITING MACHINE.

APPLICATION men SEN-26. 1918.

1,325,980. Patented Dec. 23,1919.

2 SHEETS-SHEET l- V /m/emor.- Ki kid/[4M Willa;(IL QJL QL SZQQZTQ1a.1,325,980. Patented Dec. 23, 1919.

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UNITED STATES. PATENT onn oa.

CORNELIUS B. CORCO'RAN, OF NEW YORK, 1\T. YQ, ASSIGN OR TO UNDERWOODTYPEWRITER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

TYPE-WRITIN G MACHINE.

Specification of Letters Patent. i Patented Dec. 23, 1919.

Application filed September 2c, 1918. Serial to, 255,741.

To all whom it may concern:

Be it known that I, CoR EL Us B. Con- CORAN, a citizen of the UnitedStates, residing in borough of the Bronx,in the county of the Bronx,city and State of New York,

have invented certain new and useful Im-' provements in Type-'VVritingMaehines, of which the following is a specificat on."

This invention relates to typewritlng machines, and more particularly toimprovedifiicul-ty exists in placing the finger properly thereon, and,in addition, application of considerable force is required to lift theAlso placing the little fingers on said keys changes the positions ofthe hands from that which they ordinarily have with reference to thekeyboard. Obviously it is desirable to provide means easily located,similar in that respect to the space bar, and adapted to be operated bysome part of the hand capable of producing sufficient pressure withoutThlS invention can also be much effort. used in connection with keysother than the shift keys, and may cover devices operated by parts ofthe body other than the fingers or the palms of the hands. In order toobviate the defects noted above, .I provide on each side of the machinea key having a dome-shaped head of considerable size, in position to beeasily engaged by the palm of the hand. The improved keys are positionedso as to be engaged by the palms of the corresponding hands withoutdisturbing to any great extent the positions of the 'fingers withreference to the keyboard.

Other features and advantages will hereinafter appear.

In the accompanying drawings,

Figure 1 is a sectional view in elevation of an Underwood typewritingmachine with 'the present invention applied thereto, the

platen being in normal or lower-case position. a

Fig. 2 is a fragmentary perspective view showing the relative positionof some of the parts while writing in upper-case, the normal position ofthe shift key being indicated in dot-and-dash lines.

-Fig. 3 is a perspective view on a larger scale of the attachmentsecured to the frame on the inside, the frame being shown partly 1nsection. 7 Fig. -:t is a front elevation, of the attachment and theadjoining parts of the machine, the frame and shift key being shown 1nsection.

In the Underwood typewriting machine, keys 6 are connected to type-bars'7,Ithrough lnterponents 8, to cause types 9 to print characters on awork-sheet carried on platen 10.

Carriage 11, mounted to slide on rods 12 and 13, carries laten 10 which,however, is supported in a rame 14, mounted for vertical movement incarriage 11. Connected with frame 14 is a wheel 15, resting on rail 16attached to frames 17 supported on shaft 18. Shift keys 19 are mountedon the usual arms 23, and held with their notched ends in engagementwith rod 21 by means of springs 22. Upon depression ofeither key 19, thecorresponding arm 23 will press against one of the frames 17, and, byswinging rail 16 about shaft 18, will lift the platen into position forupper-case printing.

he parts thus far described are substantially those known in the art.

Thepresent invention relates to a device for facilitating the operationof the usual case-shift mechanism, and may be made art of the machine asoriginally constructe or may be in the form of an attachment to amachine-of one of the usual types. Obviously this device can be used onone or both sides of the machine as desired. In the present embodiment,the device includes a carrying plate or bracket 24 secured to one of theside frames 25 by means of screws 26 passing through apertures inclamping plates 27 and engaging screw-threaded openings in said plate24. Upon the plate 24 is scope of the invention, and portions of theimprovements may be used without others.

Having thus described my invention, 1

claim:

1. A special key-attachment for a typewriting machine, including aframe, a keyboard, and a special, operating key, compris ing, incombination, a bracket, friction clamping means for attaching saidbracket to a part of the machine frame, and a lever system comprisingmutually cooperative levers mounted on said bracket, one of said levershaving an operating element overlying a portion of the special key, andanother of said lev'ers having a domeshaped portion conveniently locatedfor contact by a portion of the hand other than the digits thereof, sothat the special key may be operated by depression of said dome-shapedportion, without rennoving any of the digits of the hand from theiroperating position over the keyboard.

nected by a pin-and-slot connection, the free.

end of one of said levers having an operating element overlying aportion of the special key, and the free end of the other lever having adome-shaped portion conveniently located for contact by a portion of thehand other than the digits thereof, so that the special key may beoperated by depression of said dome-shaped portion, Without removing anyof the digits of the hand from their operating position over thekeyboard. CORNELIUS B. OOROORAN. Witnesses:

EDITH B. LIBBEY,

MAmo'N R. MCOAFFREY.

